<template>
  <div>
    <!-- 面包屑导航 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>商品管理</el-breadcrumb-item>
      <el-breadcrumb-item>添加商品</el-breadcrumb-item>
    </el-breadcrumb>
    <!-- 卡片视图 -->
    <el-card class="box-card">
      <!-- 添加商品信息提示 -->
      <el-alert title="添加商品信息" type="info" show-icon center> </el-alert>
      <!-- 添加商品信息进度条 -->
      <el-steps :active="activeIndex - 0" finish-status="success" align-center>
        <el-step title="基本信息"></el-step>
        <el-step title="商品参数"></el-step>
        <el-step title="商品属性"></el-step>
        <el-step title="商品图片"></el-step>
        <el-step title="商品内容"></el-step>
      </el-steps>
      <!-- tab栏区域 -->
      <el-form
        :label-position="labelPosition"
        label-width="80px"
        :model="addForm"
        :rules="addFormRules"
        ref="addFormRef"
      >
        <el-tabs
          :before-leave="tabsChange"
          :tab-position="tabPosition"
          @tab-click="tabClicked"
          v-model="activeIndex"
        >
          <el-tab-pane label="基本信息">
            <el-form-item label="商品名称" prop="goods_name">
              <el-input v-model="addForm.goods_name"></el-input>
            </el-form-item>
            <el-form-item label="商品价格" prop="goods_price">
              <el-input v-model="addForm.goods_price"></el-input>
            </el-form-item>
            <el-form-item label="商品重量" prop="goods_weight">
              <el-input v-model="addForm.goods_weight"></el-input>
            </el-form-item>
            <el-form-item label="商品数量" prop="goods_number">
              <el-input v-model="addForm.goods_number"></el-input>
            </el-form-item>
            <el-form-item label="商品分类" prop="goods_cat">
              <el-cascader
                :options="catelist"
                :props="cateProps"
                v-model="addForm.goods_cat"
                @change="handleChange"
              >
              </el-cascader>
            </el-form-item>
          </el-tab-pane>
          <el-tab-pane label="商品参数">
            <!-- 渲染表单的Item项 -->
            <el-form-item
              :label="item.attr_name"
              v-for="item in manyTableData"
              :key="item.attr_id"
            >
              <!-- 复选框组 -->
              <el-checkbox-group v-model="item.attr_vals">
                <el-checkbox
                  v-model="item1.isChecked"
                  :label="item1.labelName"
                  v-for="(item1, i) in item.res_attr_vals"
                  :key="i"
                  border
                  @change="checkboxChange"
                ></el-checkbox>
              </el-checkbox-group>
            </el-form-item>
          </el-tab-pane>
          <el-tab-pane label="商品属性">
            <el-form-item
              :label="item.attr_name"
              v-for="item in onlyTableData"
              :key="item.attr_id"
            >
              <el-input v-model="item.attr_vals"></el-input>
            </el-form-item>
          </el-tab-pane>
          <el-tab-pane label="商品图片">
            <!-- action 表示图片要上传到的后台API地址 -->
            <el-upload
              :action="uploadURL"
              :on-preview="handlePreview"
              :on-remove="handleRemove"
              list-type="picture"
              :headers="headerObj"
              :on-success="handleSuccess"
            >
              <el-button size="small" type="primary">点击上传</el-button>
            </el-upload>
          </el-tab-pane>
          <el-tab-pane label="商品内容">
            <!-- 富文本编辑器组件 -->
            <quill-editor v-model="addForm.goods_introduce"></quill-editor>
            <!-- 添加商品的按钮 -->
            <el-button type="primary" class="btnAdd" @click="add"
              >添加商品</el-button
            >
          </el-tab-pane>
        </el-tabs>
      </el-form>
    </el-card>
    <!-- 图片预览 -->
    <el-dialog title="图片预览" :visible.sync="previewVisible" width="50%">
      <img :src="previewPath" alt="" class="previewImg" />
    </el-dialog>
  </div>
</template>

<script>
export default {
  data() {
    return {
      // 进度记录
      activeIndex: '0',
      // tab位置配置
      tabPosition: 'left',
      // 表单对齐方式
      labelPosition: 'top',
      // 基本信息表单关联
      addForm: {
        goods_name: '',
        goods_price: 0,
        goods_weight: 0,
        goods_number: 0,
        goods_cat: [],
        // 图片的数组
        pics: [],
        // 商品的详情描述
        goods_introduce: '',
        attrs: []
      },
      // 表单验证规则
      addFormRules: {
        goods_name: [
          { required: true, message: '请输入商品名称', trigger: 'blur' }
        ],
        goods_price: [
          { required: true, message: '请输入商品价格', trigger: 'blur' }
        ],
        goods_weight: [
          { required: true, message: '请输入商品重量', trigger: 'blur' }
        ],
        goods_number: [
          { required: true, message: '请输入商品数量', trigger: 'blur' }
        ],
        goods_cat: [
          { required: true, message: '请选择商品分类', trigger: 'blur' }
        ]
      },
      // 商品分类列表
      catelist: [],
      // 商品分类级联选择器配置
      cateProps: {
        label: 'cat_name',
        value: 'cat_id',
        children: 'children',
        expandTrigger: 'hover'
      },
      // 动态参数列表数据
      manyTableData: [],
      // 静态属性列表数据
      onlyTableData: [],
      checkedList: [],
      // 上次图片地址
      uploadURL: this.$uploadURL,
      // 图片上传组件的headers请求头对象
      headerObj: {
        Authorization: window.sessionStorage.getItem('token')
      },
      // 图片预览路径
      previewPath: '',
      // 图片预览弹窗是否显示
      previewVisible: false
    }
  },
  computed: {
    // 选中分类id
    cateId() {
      if (this.addForm.goods_cat.length === 3) {
        return this.addForm.goods_cat[2]
      }
      return null
    }
    // 上传路径
    // uploadURL() {
    //   return this.$uploadURL
    // }
  },
  created() {
    this.getCateList()
  },
  methods: {
    checkboxChange() {
      console.log(this.manyTableData)
    },
    // 获取所有商品分类数据
    async getCateList() {
      const { data: res } = await this.$http.get('categories')

      if (res.meta.status !== 200) {
        return this.$message.error('获取商品分类数据失败！')
      }

      this.catelist = res.data
      // console.log(this.catelist)
    },
    // 级联选择器选中项变化，会触发这个函数
    handleChange() {
      if (this.addForm.goods_cat.length !== 3) {
        this.$msg.warning('请选择第三级分类！')
        this.addForm.goods_cat = []
      }
    },
    // tabs切换之前触发事件
    tabsChange(activeName, oldActiveName) {
      // console.log(activeName, oldActiveName)
      if (oldActiveName === '0' && this.addForm.goods_cat.length < 3) {
        this.$msg.warning('请选择商品分类')
        return false
      }
    },
    // tab 被选中时触发
    async tabClicked() {
      if (this.activeIndex === '1') {
        const { data: res } = await this.$http.get(
          `categories/${this.cateId}/attributes`,
          {
            params: { sel: 'many' }
          }
        )

        if (res.meta.status !== 200) {
          return this.$msg.error('获取动态参数列表失败！')
        }

        res.data.forEach((item) => {
          if (item.attr_vals.length === 0) {
            item.attr_vals = []
          } else {
            item.attr_vals = item.attr_vals.split(' ')
            item.res_attr_vals = []
            item.attr_vals.forEach((item1, index) => {
              item.res_attr_vals.push({
                checkId: index,
                labelName: item1,
                isChecked: true
              })
            })
          }
        })
        this.manyTableData = res.data
      } else if (this.activeIndex === '2') {
        const { data: res } = await this.$http.get(
          `categories/${this.cateId}/attributes`,
          {
            params: { sel: 'only' }
          }
        )

        if (res.meta.status !== 200) {
          return this.$message.error('获取静态属性失败！')
        }
        this.onlyTableData = res.data
      }
    },
    // 监听图片上传成功的事件
    handleSuccess(response) {
      console.log(response)
      // 1. 拼接得到一个图片信息对象
      const picInfo = { pic: response.data.tmp_path }
      // 2. 将图片信息对象，push 到pics数组中
      this.addForm.pics.push(picInfo)
      console.log(this.addForm)
    },
    // 处理图片预览效果
    handlePreview(file) {
      console.log(file)
      this.previewPath = file.response.data.url
      this.previewVisible = true
    },
    // 处理移除图片的操作
    handleRemove(file) {
      // console.log(file)
      // 1. 获取将要删除的图片的临时路径
      const filePath = file.response.data.tmp_path
      // 2. 从 pics 数组中，找到这个图片对应的索引值
      const i = this.addForm.pics.findIndex((x) => x.pic === filePath)
      // 3. 调用数组的 splice 方法，把图片信息对象，从 pics 数组中移除
      this.addForm.pics.splice(i, 1)
      console.log(this.addForm)
    },
    // 添加商品
    add() {
      this.$refs.addFormRef.validate(async (valid) => {
        if (!valid) {
          return this.$msg.error('请填写必要的表单项！')
        }
        // 执行添加的业务逻辑
        // lodash   cloneDeep(obj)
        const form = this.$lodash.cloneDeep(this.addForm)
        form.goods_cat = form.goods_cat.join(',')
        // 处理动态参数
        this.manyTableData.forEach((item) => {
          const newInfo = {
            attr_id: item.attr_id,
            attr_value: item.attr_vals.join(' ')
          }
          this.addForm.attrs.push(newInfo)
        })
        // 处理静态属性
        this.onlyTableData.forEach((item) => {
          const newInfo = { attr_id: item.attr_id, attr_value: item.attr_vals }
          this.addForm.attrs.push(newInfo)
        })
        form.attrs = this.addForm.attrs
        console.log(form)
        const { data: res } = await this.$http.post('goods', form)
        if (res.meta.status !== 201) {
          return this.$msg.error(res.meta.msg)
        }
        this.$msg.success(res.meta.msg)
        this.$router.push('/goods')
      })
    }
  }
}
</script>

<style lang="less" scoped>
.btnAdd {
  margin-top: 15px;
}
</style>
